Personally, I find strong MB balls to be only useful when you have a stable game (so the ball can be set up for your needs), and if you want to have a certain lane reaction. The stronger the mass bias, the easier the ball/core will re-orientate on the lane and produce the desired reaction - if it is set up for you to do so and if you play accordingly. It also limits IMHO the ball's verstility, since the core "wants" to do the same with emphasis.
I have an ambiguous opinion towards strong MB balls, having used some MoRich equipment and an XXcel with a rather mild mass bias of only 0.012" and an SR300 with even less (0.009").
On the right conditions, the strong cores with 0.020" and more have an astonishing performance. Dramatic hook/break point, killer carry, breathtaking!
But if things are not going your way... mediocre, and it is hard to improve this with release tricks etc. Personally, I'd never build an arsenal of strong MB balls, I see them as an extra addition to a base line-up of symmetrical balls which are IMHO more versatile, since I found I can do a lot more with them on changing lanes.
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DizzyFugu - Reporting from Germany
"Put some make-up on your face - Make this world a better place!"
Kahimi Karie, 'Good morning world'